Based on the Wizard Starting Move “Ritual”

“Research New Spell” Requirements:

• It requires the night of the new moon
• It requires a place of power
• You’ll have to disenchant the relevant magical scroll (or spellbook) to do it

Note: Wizards gain access to one new spell every time they gain a level. In this case, the requirements to disenchant the scroll or book are waived.
When you attempt to inscribe a new spell you’ve researched, roll+Int. 

• On a 10+, the spell is inscribed in your spellbook, and you’ve also created a single use Common Scroll that contains the spell

• On a 7-9,  the spell is inscribed in your spellbook

As is usually the case, on a 6 or less, take an XP point, and something dangerous happens (the GM will tell you what)